have an LG G6. Purchased about three days after it came out. I recently noticed what looks like a bubble in my pictures. Going back, it's been there since about may. Since the LG has two cameras, I checked the other one but it is fine. There is a line surface scratch but it's lower than the bubble and this looks just like a bubble, not like a scratch. Any idea?? Could it have been water? Although this phone is water proof I've never purposely taken it under water or dropped it in water, just around steam in the bathroom. Thank you!